查询词典 variance

M; x8 d; U* h b where the variance is a measure of the dispersion, or spread, of a set of values about the mean.

偏差是对一系列数值的平均值进行分散，或离散计算。

For girls, the majority of the variance for the presence of menarche (88%) was explained by shared environmental factors, while that for age of menarche (73%) was by genetic factors.

女性初经有88%可被共享环境因子所解释，而女性初经年龄则有73%的变异受到线性遗传因子的影响。

Firstly, the principle of the iteration method is presented, the characteristic of the method is analyzed. The downward continuation computation for model and practical data with noise of different variance is performed by means of iteration method.

首先介绍了迭代法的基本原理，分析迭代法的特点；然后利用迭代法对不同噪声水平的模型数据和实测数据进行向下延拓计算，研究噪声对迭代法的计算误差影响。

Then we used microgram analysis instrument to collect and analyze the average gray value of cellular plasma staining , used SPSS11. 5 software to process data with analysis of variance and S - N - K .

从吸烟，脑梗死及VCAM-1三方面揭示吸烟对脑梗死的影响及其分子机制(VCAM-1的表达)，为吸烟引起的脑损害及其防治提供理论依据。

Markov proved the minimality of variance of LSE in 1900. this is the famous Gauss-Markov definition, which found the position for LSE in parameter estimate field.

后来， A。 A.Markov于1900 年证明了LSE 的方差最小性质，即著名的Gauss -Markov定理，奠定了LSE 在参数估计理论中的地位。

In this paper, by using complex configuration optimization method, we calculate the optimum parameters for a given mass TMD to meet the condition of minimum variance of displacement .

本文利用复形调优法进行TMD参数设计的优化计算，研究在满足结构最小均方位移条件下，对于给定质量比的调质阻尼器的最优参数，即最优频率和最优阻尼比。

Therefore, the minimum variance and deviation methodology was introduced, based on which, stratified random sampling technology was used for sample design, and thus making an overall assessment more truly on water quality in distributi.

为此提出以最小方差和偏差的方法论，采用分层随机抽样技术进行样本设计，从而对管网水质进行较为真实的全面评价，同时对影响管网水质的因素进行分析。

According to the variance module and resolution after deconvolution, the ideal mixed phase wavelets may be extracted from the wavelet gatherings with the same amplitude spectrum and different phase spectrums finally. Therefore the target for raising the resolution of seismic records can be attained by the determinacy wavelet deconvolution. Through the wavelet extraction tests for theoretic synthetic records and actual seismic data and the processing of enhancing resolution of seismic data by use of the wavelets extracted, it was shown that such a method is correct and effective.

依据反褶积后地震记录方差模大小和分辨率情况，最终从一系列相同振幅谱不同相位谱子谱集合中确定理想的混合相位子波，通过确定性子波反褶积达到提高地震记录分辨率的目标对理论合成地震记录和实际地震记录进行了子波提取实验，并利用提取的地震子波对地震资料进行了提高分辨率的了处理，实验结果表明了该布法约正确准和有效性。

At last, most probable value and precision of gyro theodolite's true north are solved by means of simple-easy and close methods, and variance of reversal point is estimated with the principle of component estimation.

对于逆转点的方差，要用方差分量估计原理进行估算。

The conclusions of this thesis are: The Exponentially Weighted Moving Average approaches of Variance-Covariance method is better than Historical simulation method and Monte-Carlo simulation method.

可见在给予近期历史资料较重的权重，在某种程度上，反映出波动群聚性与随时间而改变的现象，近期市场上的任何冲击将快速的反应在波动性的估计值上。

He think the world care little whether a man is a churchman, so long as he is good and true.

他想只要一个人慈善忠厚，谁也不会介意他是否是个教徒。

Aiming at the temperature control requirement of multi-workplats fritting furnace, this paper presents an electric circuit design.

针对多工位扩散炉的温度控制要求，介绍了以TCA785为核心的可控硅移相触发电路设计。